Undersized RX Frame

For an Ethernet frame, the minimum payload size is 46 for non-VLAN tagged and 42 for the VLAN tagged frames. If the RX frame does not meet the minimum payload size, it is flagged as an undersized RX frame. When this occurs, the Ethernet 10G MAC core asserts RX_AXI_TUSER and increments the RX statistic reporting, cnt_rx_frame_undersized. Figure 1 describes an undersized RX frame.